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Patch tuesday September performance hit

Martijn Kools


Hi all,


Since the Windows Updates from September Patch Tuesday we suffer a performance hit on our XenApp servers, lot of our servers are running very high on CPU suddenly.


I've noticed MS enabled the Spectre mitigation by default now on Windows Server 2016: https://support.microsoft.com/en-us/help/4072698/windows-server-speculative-execution-side-channel-vulnerabilities-prot


With no option to disable....


So if you update and user complain about performance this could be the cause.


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